Which of the following distances represents an astronomical unit? athe distance between Earth and the moon bthe distance between the sun and Earth cthe distance across the entire solar system dthe distance across the Milky Way galaxy

You are measuring the distance between our Solar System and the nearest star- which unit of measurement should you use?

Which of the following best describes the distance between an astronomical unit and a light-year?b007d9619c8c25c7b5db1dcbc64088b4.webm351 KB aAn AU equals the distance between Earth and the Sun; a light-year equals the angle between an object’s apparent positions when viewed from two different locations. bA light-year is useful for measuring objects fewer than 300 light-years from Earth; an AU is useful for measuring objects more than 300 light-years from Earth. cAn AU is calculated by dividing kilometers by 150 million; a light-year is calculated by determining how long it takes an object to travel 150 million AUs. dAn AU is useful for measuring distances within the solar system; a light-year is useful for measuring distances beyond the solar system.

. Name the unit which is used to express distances between the various celestial bodies (like stars and planets).

Match the following units to their use. Possible units are: light years, kilometres, astronomical units and light years. Useful for measuring distances between cities on Earth.Useful for distances in the solar system.Useful for distances between stars and galaxies.

Case Study 2:In solar system the distance between Sun and Saturn is 1,433,500,000,000 m. Thedistance between Saturn and Uranus is 1,439,000,000,000 m and the distancebetween Sun and Earth is 1.496 × 1011 m.1) Which of the three distances is smallest?2) The sum of the distance between Sun and Saturn, Saturn and Uranus inScientific notation is _____________3) The difference of the distance between Sun and Earth, Saturn and Uranus inScientific notation is ___________